My baby girl loves it but it only lasted 3 hours before she destroyed it, definitely not English Bulldog proof lolThe charging light never changes colors and constantly just stops charging at random. There was no clear directions with the fish nor on the battery box to tell you which way the switch was on or off. This was especially confusing since the fish doesn't just start moving when it is on. For a couple hours we thought it was defective. It wasn't until i absentmindedly threw it on the ground that it turned it self on. The fish needs to basically be hit to work. The motion is short lived.I was hoping our cats who love active play with other toys and wrestling each other would love it, but they did not seem to care for it. Especially considering that by the time they decided they were interested and not afraid of it, the motion would quickly die. They could not seem to get it to move on their own.We ended up removing the battery pack and loading the inside of the fish with catnip. Occasionally they engage with it now.I am glad I got this on a Prime Day deal, other wise I would be really upset with what I paid for it.Well spent, cat loves it.My only wish was it lasted longer with each charge. Otherwise a great toy!